dmoj.ca
Registered
Page analyze update date:
2026/06/05 00:21:17
Last whois update date:
2026/08/08 00:53:06
Domain Status
Registered
Paid till
06.11.2028
Available from
06.12.2028
×
![Fullscreen website screenshot]()
dmoj.ca Website screenshot
SEO Score
73.29%
107
Score achieved
146
Maximum score
Main Information
Title: Главная - DMOJ: Modern Online Judge
Description: Practice problem solving and compete against others on the DMOJ, a modern contest platform and archive of programming problems.
Keywords: unknown
Page Encoding:
utf-8
Page Filesize: 41 KB
Server Information
IP: 104.21.53.231
Encoding: utf-8
Meta Tags List
- equiv: Content-Type content: text/html; charset=UTF-8
- name: keywords content: DMOJ,Canadian,online judge,programming,code,contest,CCC,CCC Solutions,CCC 2015,CCO,IOI,JOI,COCI,DMOPC,Canada,Ontario,Toronto,grade,interactive
- id: viewport name: viewport content: width=device-width, initial-scale=1
- name: msapplication-TileColor content: #FFBB33
- name: msapplication-TileImage content: /mstile-144x144.png
- name: theme-color content: #FFBB33
- property: og:site_name content: DMOJ: Modern Online Judge
- property: og:url content: https://dmoj.ca/
- name: description content: Practice problem solving and compete against others on the DMOJ, a modern contest platform and archive of programming problems.
Internal Links
External Links
Whois Information
domain_name: dmoj.ca
update_date: 2025-09-07T16:31:26Z
update_time: 1757262686
creation_date: 2014-11-06T02:17:56Z
creation_time: 1415240276
expiration_date: 2028-11-06T02:17:56Z
Whois Raw Data
Domain Name: DMOJ.CA
Registrar: Grape Inc.
Domain Status: client transfer prohibited
Domain Status: client update prohibited
Creation Date: 2014-11-06T02:17:56Z
Registry Expiry Date: 2028-11-06T02:17:56Z
Updated Date: 2025-09-07T16:31:26Z
Name Server: TARA.NS.CLOUDFLARE.COM
Name Server: TERIN.NS.CLOUDFLARE.COM
REGISTRAR Contact: Grape Inc.
>>> Last update of RDAP database: 2026-08-08T00:53:06Z
Robots.txt
User-agent: *
Disallow: /500
Disallow: /accounts
Disallow: /admin
Disallow: /api
Disallow: /comments
Disallow: /contest/*/clone
Disallow: /contest/*/join
Disallow: /contest/*/leave
Disallow: /contest/*/moss
Disallow: /contest/*/participation
Disallow: /contest/*/participations
Disallow: /contest/*/rank
Disallow: /contests/tag
Disallow: /contest/*/stats
Disallow: /contest/*/submissions
Disallow: /data
Disallow: /edit/profile/$
Disallow: /feed
Disallow: /judge-select2
Disallow: /mailgun/mail_activate/$
Disallow: /organization/*/edit
Disallow: /organization/*/join
Disallow: /organization/*/kick
Disallow: /organization/*/leave
Disallow: /organization/*/request
Disallow: /organization/*/requests
Disallow: /problem/*/clone
Disallow: /problem/*/data
Disallow: /problem/*/manage/submission
Disallow: /problem/*/pdf
Disallow: /problem/*/rank
Disallow: /problem/*/resubmit
Disallow: /problems/random/$
Disallow: /problem/*/submissions
Disallow: /problem/*/submit
Disallow: /problem/*/test_data
Disallow: /problem/*/tickets
Disallow: /problem/*/vote
Disallow: /problem/*/vote/delete
Disallow: /problem/*/vote/stats
Disallow: /src
Disallow: /stats
Disallow: /submission
Disallow: /submissions
Disallow: /tasks
Disallow: /ticket
Disallow: /tickets
Disallow: /user/$
Disallow: /users/find/$
Disallow: /user/*/submissions
Disallow: /widgets
SEO Audit
Technical SEO
✓
Response Code
200
Status 200 OK - page loads correctly.
✓
Character Encoding
Page: utf-8, Header: utf-8
Character encoding consistent between HTML and headers.
✓
Page Size
42110 bytes
Page size acceptable for fast loading.
✓
Resources
31 total
Moderate number of resources. Consider combining files.
✓
Hreflang Tags
0 hreflang tags
Add hreflang tags if you have multilingual content.
✓
Robots.txt
Exists
Robots.txt file found.
!
Sitemap
Not found
Add sitemap.xml and reference it in robots.txt.
✓
HTTPS
Yes
Secure HTTPS connection enabled.
✓
Compression
zstd
Gzip or Zstd compression enabled for faster loading.
!
Caching
Not set
Add cache-control headers to improve loading speed for returning visitors.
✓
Page Speed
2.09 ms
Excellent loading speed.
On-Page SEO
✓
Title
Главная - DMOJ: Modern Online Judge
Good title length (30-60 characters).
✓
Meta Description
Practice problem solving and compete against others on the DMOJ, a modern contest platform and archive of programming problems. Lenght:127
Good meta description length (100-160 characters).
!
H1 Heading
0 found - ""
Add exactly one H1 heading with primary keywords.
✓
Word Count
614
Good content length (500-2000 words recommended).
!
Canonical Tag
Add canonical tag to prevent duplicate content issues.
✓
Duplicate Meta
[]
No duplicate meta tags found.
✓
Keywords
Meta keywords are optional (not used by major search engines).
Content and UX
✓
Language
ru
Language attribute properly set.
!
Images
7 total, 1 missing ALT
Add ALT text to images for accessibility and SEO.
✓
Viewport
width=device-width, initial-scale=1
Viewport meta tag properly set for mobile devices.
!
Open Graph
Missing: og:title, og:description, og:image
Add missing OpenGraph tags for social media sharing: og:title, og:description, og:image
✓
Structured Data
1 JSON-LD scripts
Structured data (JSON-LD) found.
Positions in Google
Search Phrases - Google
| Position | Phrase | Page | Snippet |
|---|---|---|---|
| 6 | /problem/tree1 |